CN206301449U - Intelligent power safe early warning watch-dog - Google Patents
Intelligent power safe early warning watch-dog Download PDFInfo
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- CN206301449U CN206301449U CN201621380914.6U CN201621380914U CN206301449U CN 206301449 U CN206301449 U CN 206301449U CN 201621380914 U CN201621380914 U CN 201621380914U CN 206301449 U CN206301449 U CN 206301449U
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Abstract
The utility model is related to a kind of intelligent power safe early warning watch-dog, the liquid crystal display display unit being connected with single machine unit including single machine unit and respectively, three-phase current detection unit, residual current detection unit, temperature detecting unit, alarm unit, circuit-breaker status collecting unit, circuit breaker control unit, communication unit and fault electric arc detection unit, fault electric arc detection unit includes the bandpass filtering unit being sequentially connected, fault electric arc signal extraction unit, shaping pulse processing unit and Phase Processing unit, the input of bandpass filtering unit is connected by coupling sampling capacitance with alternating current 220V circuit, the output end of Phase Processing unit is connected with single machine unit.The fault electric arc detection circuit that the utility model is used, completely without current transformer is used, directly sampled using Capacitance Coupled, overcome and restricted by current sampling mutual inductor range and no-load voltage ratio, rated current is no longer only limitted to less than being used in 63A circuits, the reliability of monitoring is improved.
Description
Technical field
The utility model is related to supply line's monitoring device, more particularly to a kind of intelligent power safe early warning watch-dog.
Background technology
Supply line and equipment are installed and used for some reason, such as improper, aging circuit or mechanical damage reason, its
Decreasing insulating, causes have abnormal electric current to flow through between supply line and equipment and the earth, here it is electric leakage.Electric leakage makes
Portion of electrical current flows into the earth, causes energy waste；Human contact's false voltage causes electric shock, threat to life safety；Damage in insulation
Earth fault may occur and cause electrical fire.
So-called earth fault refers to the short circuit of energized conductor and ground.Electric wiring and device have ground connection because of damage in insulation
During failure, electric arc, electric spark, this electric arc will be caused to be referred to as earth fault electricity in leak current fault point and conductive bad junction
Arc, with very big impedance and voltage drop, it limits fault current, makes overcurrent protective device akinesia or can not act in time
To cut off the electricity supply, and hundreds of milliamperes of fault electric arc produce localized hyperthermia up to more than 2000 DEG C, it is sufficient to surrounding of igniting it is flammable
Thing and cause electrical fire.In addition, when fault electric arc occurs, the fluctuation of line voltage distribution and the mutation of line current can be caused,
These reasons also easily lead to electrical equipment job insecurity or equipment fault.For electrical fire, earth fault compares line
Short out road has bigger harmfulness, and in fact fault electric arc is the main cause that electrical fire occurs.
Existing various electric fire monitoring systems, are all only to detect residual current, conductor temperature and load current substantially,
Some can also be controlled to the dropout of circuit breaker.And many serious fire incidents are by being less than specified electricity in circuit
What the fault electric arc of stream or prospective short circuit current caused, therefore existing various electric fire monitoring systems cannot enter to fault electric arc
Row monitoring.These dangerous electric arcs are likely to occur in the irrational or aging supply line of design, appliance plug and
In the power line of household electrical appliance, internal wire harness or parts insulation.When fault electric arc occurs, electric leakage, excessively stream on circuit and
The protection devices such as short circuit, possibly cannot detect fault electric arc or cannot action power dump rapidly, easily trigger fire.Cause
This, it is necessary that " fault electric arc detection device " is further added by existing electric fire monitoring system, so that mistake is reduced or avoided
Report or fail to report alert, raising early warning accuracy rate and alarm reliability, it is to avoid the malfunction interference to power supply-distribution system.
Fault electric arc detector is that one kind can at any time be monitored and detect fault electric arc, can accomplish to recognize fault electric arc
With normal arc, while can also in time cut off line related prevents a kind of electric wiring protection device on fire.Exploring at present
Fault electric arc detection technique be that the load current variable signal on circuit is monitored by current transformer, being detected with this is
The generation of no faulty electric arc.Realize that the quick detection electric arc that is out of order there are three premises：
1. accurate arc-detection：The generation of electric arc is detected in a short time, and this detection is included to load operation institute
The normal arc detection of generation and the fault electric arc being supported on produced by abnormal condition are detected.
2. quick arc characteristic analysis：Detecting after electric arc is produced with efficiently and accurately algorithm, loaded
Phase angle state, judge load type, so as to judge that the generation of electric arc belongs to normal or abnormal.
3. abundant load arc characteristic curve is laid in：Load arc characteristic as much as possible should be included, this needs a large amount of
Experiment basis, most of load arc characteristic curve is analyzed and is stored for curve comparison and is used.
Technical problem one：Find that the electric current and voltage waveform of electric arc are generally not by the experiment to a large amount of arc waveforms
Simple sinusoidal waveform, electric arc has probability nature, is not sustained.Just because of fault electric arc waveform has non-sine
And randomness, and under some load equipment environment, start and the current waveform of normal operative condition has with arc waveform
Some similitudes, and the electric arc under various working conditions can be accurately emulated without a kind of fault electric arc Mathematical Modeling at present
Waveform.So, the current data of fault electric arc and normal operating conditions under various loads is gathered by substantial amounts of experiment, work out
Fault electric arc and the property difference of normal work, set up fault electric arc database just into the difficulty of research and development fault electric arc detection device
Point.
Technical problem two：Due at present explore fault arc detection method be generally to be monitored using current transformer
What the load current change on circuit was realized, and the maximum load current on circuit is typically than larger, this requires electric current
Transformer will have enough range and no-load voltage ratios.Thus attend to one thing and lose sight of another unavoidably, current transformer range and no-load voltage ratio one are big, certainly
The close-up of the current waveform to fault electric arc and normal operating conditions is influenced whether, it is difficult to find out fault electric arc with normal work
The property difference of work, sets up fault electric arc database and does not just know where to begin.Therefore, only a few money fault electric arcs are visited currently on the market
Survey device and be limited to single-phase 220V rated current less than being used in 63A circuits, it is main to monitor end supply line and use electric loading.
The content of the invention
The utility model mainly solves original electric fire monitoring system and cannot monitor fault electric arc, existing fault electric arc
Detector is generally monitored using current transformer, and the maximum load current on circuit is typically than larger, and this will
Seeking current transformer will have enough range and no-load voltage ratios, and current transformer range and no-load voltage ratio one are big, influence whether certainly to failure
The close-up of the current waveform of electric arc and normal operating conditions, it is difficult to the property difference of fault electric arc and normal work is found out,
The technical problem of the accuracy of influence fault electric arc monitoring；A kind of intelligent power safe early warning watch-dog is provided, it can monitor event
Barrier electric arc, circuit is detected using novel fault electric arc, completely without current transformer is used, is directly adopted using Capacitance Coupled
Sample, overcomes and is restricted by current sampling mutual inductor range and no-load voltage ratio, is no longer only limitted to make during rated current is less than 63A circuits
With the reliability of raising monitoring.
The utility model another object is to provide a kind of intelligent power safe early warning watch-dog, and it is except that can gather remaining electricity
Outside stream, line temperature and load current and control breaker, moreover it is possible to which three-phase voltage is acquired, will " three-phase voltage " and
The gathered data of " three-phase current " improves Electrical Safety early warning and monitoring collectively as the assistant criteria for judging electrical fire omen
Reliability.
The utility model is it is also an object that provide a kind of intelligent power safe early warning watch-dog, it has comprehensively perfect
Communication mode, networking is convenient, easily can constitute jointly fire monitoring system with other alarms or monitoring host computer, or
The independent networking of person builds City-level " intelligent Electrical Safety early warning supervisory systems ".
Above-mentioned technical problem of the present utility model is mainly what is be addressed by following technical proposals：The utility model bag
Include single machine unit and the liquid crystal display display unit, three-phase current detection unit, the residual current that are connected with single machine unit respectively
Detection unit, temperature detecting unit, alarm unit, circuit-breaker status collecting unit, circuit breaker control unit and communication unit, its
It is characterised by including fault electric arc detection unit, fault electric arc detection unit includes the bandpass filtering unit, the failure that are sequentially connected
Arc signal extraction unit, shaping pulse processing unit and Phase Processing unit, the input of bandpass filtering unit is by coupling
Sampling capacitance is connected with alternating current 220V circuit, and the output end of Phase Processing unit is connected with described single machine unit.This technology
Scheme remains the residual current that original electric fire monitoring system possesses, line temperature, load current monitoring function and disconnected
Road device control function, and increased fault electric arc detection function.Find that electric arc has one by the analysis to a large amount of arc waveforms
A little common universal features：The waveform of voltage and current includes high-frequency noise；Electric arc is typically to intersperse among between normal current
It is fragmentary to dodge ripple；Each semi-period wave of arc current is extinguished before the zero crossing of normal current, after resume combustion after zero point；Edge
Electric arc has voltage drop.For above-mentioned arc data analysis result, fault electric arc detection unit in the technical program is by electric capacity coupling
Close the current changing signal of sampling, first pass around the bandpass filtering unit of 10kHz~250kHz, then by " sporadicly dodging ripple " and
The discovery of " extinguishing before zero crossing, after resume combustion after zero point " carrys out reliable extraction fault electric arc signal.Due to by various complexity
Load equipment ambient influnence, it is necessary to which the fault electric arc signal to extracting carries out shaping pulse treatment, then according to voltage and electricity
Stream carries out Phase Processing in the relation for having voltage drop along electric arc, is most processed into single machine unit through A/D samplings afterwards.It is single
Piece machine unit combines to reject interference error signal according to step-by-step counting, pulsewidth timing and phase angle variations three elements, prevent wrong report,
Prevent malfunction, with sensitive generation reliable, that fault electric arc on circuit can be detected within level time second is detected, can be in wire
Insulating barrier and surrounding combustible send alarm signal before not yet burning, and can effectively reduce due to loose contact, insulation ag(e)ing, machinery
Electrical fire occurrence probability caused by the factors such as external force, it is to avoid electrical fire occurs, and successfully avoids the need for substantial amounts of
Fault electric arc database is set up based on experiment for the research and development severe bottleneck of curve comparison.When the residue in protected circuit
During the residual current that current transformer is detected has exceeded pre-set value, or fault electric arc detection unit detects protected circuit
There occurs abnormal fault electric arc, or the temperature that detects of temperature sensor beyond pre-set value when, single machine unit warp
Control signal is sent after analysis, confirmation to start alarm signal to alarm unit or send control signal to circuit breaker to cut off
Power supply.Various warning messages, residual current size, sensor temperature, three-phase electricity piezoelectricity can be shown by liquid crystal display display unit
The important electric parameter of stream etc. protected circuit.The utility model can accurately monitor the failure and exception of electric wiring, and and
Shi Jilu and preservation, can find the hidden danger of electrical fire, and push warning message and important electric ginseng in time by communication unit
Number reminds safety manager to eliminate disaster hidden-trouble in time to remote monitoring platform or service centre.The utility model is used
Fault electric arc detection circuit, completely without current transformer is used, directly using Capacitance Coupled sampling, overcome by electric current
The restriction of sampling transformer range and no-load voltage ratio, is no longer only limitted to rated current less than being used in 63A circuits, improves the reliability of monitoring
Property.
Preferably, described bandpass filtering unit includes electric capacity C14, electric capacity C26, electric capacity C22, resistance R8, resistance
R18, resistance R23 and inductance L2, inductance L3, electric capacity C14 and electric capacity C26 are exactly described coupling sampling capacitance；Described failure
Arc signal extraction unit include resistance R9, resistance R14, resistance R20, resistance R24, electric capacity C18, electric capacity C24 and diode D6,
Diode D7, voltage-stabiliser tube V1；Electric capacity C14, one end of electric capacity C26 are connected with alternating current 220V circuit respectively；The other end of electric capacity C14
One end with resistance R8 is connected, the other end of resistance R8, is grounded through inductance L2 all the way, and another road is through resistance R9's and diode D6
Positive pole is connected, and the negative pole of diode D6 is grounded through resistance R14, and the positive pole of diode D6 is grounded through electric capacity C18 again；Electric capacity C26's
The other end is connected with one end of resistance R23, the other end of resistance R23, is grounded through inductance L3 all the way, another road through resistance R24 and
The positive pole of diode D7 is connected, and the negative pole of diode D7 is grounded through resistance R20, and the positive pole of diode D7 is grounded through electric capacity C24 again；
One end of electric capacity C22 is connected with the ground wire of alternating current 220V, and the other end of electric capacity C22 is grounded through resistance R18, the two ends of voltage-stabiliser tube V1
It is connected with the negative pole of diode D6 and the negative pole of diode D7 respectively, and the negative pole of diode D6 and the negative pole of diode D7 divide
Not be connected with the input of described shaping pulse processing unit.
Preferably, described shaping pulse processing unit includes resistance R12, resistance R16, resistance R17, resistance R19, electricity
Resistance R21, resistance R22, electric capacity C15, electric capacity C21, electric capacity C23, electric capacity C25 and amplifier U7, amplifier U8；Described fault electric arc letter
One output end of number extraction unit is not only connected with one end of resistance R12 but also is connected with one end of electric capacity C15, and resistance R12's is another
One end is grounded through electric capacity C21, and the other end of electric capacity C15 is grounded through resistance R16, the tie point and amplifier of resistance R12 and electric capacity C21
The in-phase input end of U7 is connected, and electric capacity C15 is connected with the tie point of resistance R16 with the inverting input of amplifier U7, amplifier U7's
Output end is grounded through resistance R17；Another output end of described fault electric arc signal extraction unit both with one end of resistance R21
It is connected and be connected with one end of electric capacity C25 again, the other end of resistance R21 is grounded through electric capacity C23, and the other end of electric capacity C25 is through resistance
R19 is grounded, and resistance R21 is connected with the tie point of electric capacity C23 with the inverting input of amplifier U8, the company of electric capacity C25 and resistance R19
Contact is connected with the in-phase input end of amplifier U8, and the output end of amplifier U8 is grounded through resistance R22；The output end and amplifier of amplifier U7
Input of the output end of U8 respectively with described Phase Processing unit is connected.
Preferably, described Phase Processing unit includes trigger U6 and trigger U9, trigger U6, trigger U9 are equal
Using 4013 double D triggers；The CLK pin of trigger U6, the CLK pin of trigger U9 respectively with described shaping pulse processing unit
Output end be connected, the D pin of trigger U6, the D pin of trigger U9 connect+3.3V voltages, the S pin of trigger U6, trigger U9
S pin be grounded, the R pin of trigger U6 are connected with the Q pin of trigger U9, trigger U6'sThe R pin phases of pin and trigger U9
Even, the Q pin of trigger U6, trigger U9Pin is connected with described single machine unit respectively.
Preferably, described intelligent power safe early warning watch-dog includes detecting voltage by three phase unit, three-phase voltage inspection
Unit is surveyed to be connected with described single machine unit.Because fault electric arc occur when, can not only cause line current mutation but also
The fluctuation of line voltage distribution is also resulted in, so just necessary increase " three-phase current " that collection " three-phase voltage " comes and gathers
Play the reliability that Electrical Safety early warning and monitoring is improved collectively as the assistant criteria for judging electrical fire omen.
Preferably, described alarm unit is the acousto-optic warning unit for including luminescence alarm diode and buzzer.Adopt
Sound-light double alarm form is used, the reliability of alarm is improved, also makes alarm signal more eye-catching.
Preferably, described temperature detecting unit includes that line temperature detection unit and the detection of distribution box internal temperature are single
Unit, line temperature detection unit and distribution box internal temperature detection unit are connected with described single machine unit respectively.Increase is adopted
Collection temperature inside the box are the reference frames as relative temperature difference between " line temperature " and " environment temperature ", so in monitoring
In 220V alternating current circuits " A B C N circuits " temperature rise when can exclude the influence of environmental factor, can more accurately by " circuit temperature
Degree " improves the reliability of monitoring as the important means of early warning electrical fire.
Preferably, described communication unit includes RS485 communication modules, ethernet communication module, GPRS wireless telecommunications
Module and short message transmitter module, RS485 communication modules, ethernet communication module, GPRS wireless communication modules and short message transmitting mould
Block is connected with described single machine unit respectively.Can be by warning message and important electric parameter with short by short message transmitter module
Letter form is sent on relevant staff's mobile phone.By GPRS wireless communication modules, can by warning message and it is important electrically
Parameter is sent to the mobile phone A PP of staff.The technical program has comprehensively perfect communication mode, does not only have classics
" RS485 communication ports ", " network interface ", and also very useful " SMS prompting " and " GPRS wireless telecommunications+mobile phone terminal
APP " functions, can easily constitute jointly fire monitoring system, or individually networking with other alarms or monitoring host computer
Build City-level " intelligent Electrical Safety early warning supervisory systems ", it is ensured that can more in time, rapidly process Electrical Safety hidden danger, greatly
It is big to improve electrical safety.
The beneficial effects of the utility model are：Remain residual current, line temperature, load current monitoring function and open circuit
Device control function, increased fault electric arc detection function and three-phase-voltage monitoring function, the three-phase voltage and three-phase electricity that will be gathered
Stream collectively as the assistant criteria for judging electrical fire omen, using novel fault electric arc detection circuit, completely without making
Current Transformer, is directly sampled using Capacitance Coupled, is overcome and is restricted by current sampling mutual inductor range and no-load voltage ratio, no longer
Rated current is only limitted to less than being used in 63A circuits, the reliability of monitoring is improved.With perfect communication mode comprehensively, can be with
Fire monitoring system is easily constituted jointly with other alarms or monitoring host computer, or individually networking builds City-level " intelligence
Intelligent type Electrical Safety early warning supervisory systems ", it is ensured that can more in time, rapidly process Electrical Safety hidden danger, greatly improve electricity consumption peace
Quan Xing.
Brief description of the drawings
Fig. 1 is a kind of circuit theory attachment structure block diagram of the present utility model.
Fig. 2 is a kind of circuit theory attachment structure block diagram of fault electric arc detection unit in the utility model.
Fig. 3 is a kind of circuit theory diagrams of fault electric arc detection unit in the utility model.
1. single machine unit in figure, 2. liquid crystal display display unit, 3. three-phase current detection unit, 4. residual current detection list
Unit, 5. circuit-breaker status collecting unit, 6. circuit breaker control unit, 7. fault electric arc detection unit, 8. detecting voltage by three phase list
Unit, 9. acousto-optic warning unit, 10. line temperature detection unit, 11. distribution box internal temperature detection units, 12.RS485 communications
Module, 13. ethernet communication modules, 14.GPRS wireless communication modules, 15. short message transmitter modules, 71. bandpass filtering units,
72. fault electric arc signal extraction units, 73. shaping pulse processing units, 74. Phase Processing units.
Specific embodiment
Below by embodiment, and with reference to accompanying drawing, the technical solution of the utility model is described in further detail.
Embodiment：The intelligent power safe early warning watch-dog of the present embodiment, as shown in figure 1, including single machine unit 1, liquid
Crystalline substance screen display unit 2, fault electric arc detection unit 7, detecting voltage by three phase unit 8, three-phase current detection unit 3, residual current
Detection unit 4, line temperature detection unit 10, distribution box internal temperature detection unit 11, acousto-optic warning unit 9, breaker shape
State collecting unit 5, circuit breaker control unit 6 and the RS485 communication modules 12 as communication unit, ethernet communication module 13,
GPRS wireless communication modules 14 and short message transmitter module 15, liquid crystal display display unit 2, fault electric arc detection unit 7, three-phase voltage
Detection unit 8, three-phase current detection unit 3, residual current detection unit 4, line temperature detection unit 10, distribution box inside temperature
Degree detection unit 11, acousto-optic warning unit 9, circuit-breaker status collecting unit 5, circuit breaker control unit 6, RS485 communication modules
12nd, ethernet communication module 13, GPRS wireless communication modules 14 and short message transmitter module 15 are connected with single machine unit 1 respectively,
Acousto-optic warning unit includes luminescence alarm diode and buzzer.As shown in Fig. 2 fault electric arc detection unit 7 includes phase successively
Bandpass filtering unit 71 even, fault electric arc signal extraction unit 72, shaping pulse processing unit 73 and Phase Processing unit 74,
The input of bandpass filtering unit 71 is connected by coupling sampling capacitance with alternating current 220V circuit, the output of Phase Processing unit 74
End is connected with single machine unit 1.
As shown in figure 3, bandpass filtering unit 71 includes electric capacity C14, electric capacity C26, electric capacity C22, resistance R8, resistance R18, electricity
Resistance R23 and inductance L2, inductance L3, electric capacity C14 and electric capacity C26 are exactly described coupling sampling capacitance；Fault electric arc signal extraction
Unit 72 include resistance R9, resistance R14, resistance R20, resistance R24, electric capacity C18, electric capacity C24 and diode D6, diode D7,
Voltage-stabiliser tube V1；Shaping pulse processing unit 73 includes resistance R12, resistance R16, resistance R17, resistance R19, resistance R21, resistance
R22, electric capacity C15, electric capacity C21, electric capacity C23, electric capacity C25 and amplifier U7, amplifier U8；Phase Processing unit 74 includes trigger U6
With trigger U9, trigger U6, trigger U9 use 4013 double D triggers.Electric capacity C14, electric capacity C26 one end respectively and hand over
Zero line N, live wire L in stream 220V circuits are connected；The other end of electric capacity C14 is connected with one end of resistance R8, and resistance R8's is another
End, is grounded through inductance L2 all the way, and another road is connected through resistance R9 with the positive pole of diode D6, and the negative pole of diode D6 is through resistance
R14 is grounded, and the positive pole of diode D6 is grounded through electric capacity C18 again；The other end of electric capacity C26 is connected with one end of resistance R23, resistance
The other end of R23, is grounded through inductance L3 all the way, and another road is connected through resistance R24 with the positive pole of diode D7, and diode D7's is negative
Pole is grounded through resistance R20, and the positive pole of diode D7 is grounded through electric capacity C24 again；One end of electric capacity C22 and the ground wire phase of alternating current 220V
Even, the other end of electric capacity C22 is grounded through resistance R18, the two ends of voltage-stabiliser tube V1 respectively with the negative pole and diode D7 of diode D6
Negative pole be connected；The negative pole of diode D6, is not only connected with one end of resistance R12 but also is connected with one end of electric capacity C15, resistance R12
The other end be grounded through electric capacity C21, the other end of electric capacity C15 is grounded through resistance R16, the tie point of resistance R12 and electric capacity C21 and
The in-phase input end of amplifier U7 is connected, and electric capacity C15 is connected with the tie point of resistance R16 with the inverting input of amplifier U7, amplifier
The output end of U7 is grounded through resistance R17；The negative pole of diode D7, be not only connected with one end of resistance R21 but also and electric capacity C25 one end
It is connected, the other end of resistance R21 is grounded through electric capacity C23, the other end of electric capacity C25 is through resistance R19 ground connection, resistance R21 and electric capacity
The tie point of C23 is connected with the inverting input of amplifier U8, and electric capacity C25 is same mutually defeated with amplifier U8 with the tie point of resistance R19
Enter end to be connected, the output end of amplifier U8 is grounded through resistance R22；The output end of amplifier U7 is connected with the CLK pin of trigger U6, amplifier
The output end of U8 is connected with the CLK pin of trigger U9, and the D pin of trigger U6, the D pin of trigger U9 connect+3.3V voltages, triggering
The S pin of device U6, the S pin of trigger U9 are grounded, and the R pin of trigger U6 are connected with the Q pin of trigger U9, trigger U6'sPin
It is connected with the R pin of trigger U9, the Q pin of trigger U6, trigger U9Pin is connected with single machine unit 1 respectively.This implementation
In example, single machine unit includes single-chip microcomputer U15 and its peripheral circuit, and single-chip microcomputer U15 uses STM32F107VCT6 single-chip microcomputers, touches
The Q pin of hair device U6, trigger U9Pin 65 pin respectively with single-chip microcomputer U15,64 pin are connected.
The utility model is arranged in 400V low-voltage distribution systems, in detecting TN-C-S, TN-S and local T T systems
The electric parameter that relevant electric disaster hidden-trouble is produced, when parameter is monitored in protected circuit more than alarm setting value, can send out
Go out sound and light alarm or control circuit breaker trip circuit, to eliminate electric disaster hidden-trouble.
When the residual current that the residual current transformer in protected circuit is detected has exceeded pre-set value, or failure electricity
Arc detection unit there occurs abnormal fault electric arc in detecting protected circuit, or the temperature that temperature sensor is detected surpasses
When having gone out pre-set value, single machine unit sends control signal and starts alarm signal or hair to alarm unit after analysis, confirmation
Go out control signal to circuit breaker to cut off the electricity supply.The fault electric arc detection circuit that the utility model is used, completely without
Using current transformer, directly sampled using Capacitance Coupled, overcome and restricted by current sampling mutual inductor range and no-load voltage ratio, no
Rated current is only limitted to again less than being used in 63A circuits, improves the reliability of monitoring.Can be shown respectively by liquid crystal display display unit
Plant the important electric parameter of warning message, residual current size, sensor temperature, three-phase voltage current etc. protected circuit.
The utility model can realize residual current, load current, three-phase voltage, the temperature (wire to each key node such as distribution box cabinet
Temperature, environment temperature and distribution box internal temperature) and fault electric arc monitoring, in time grasp electric wiring operation conditions, find
And prevent the potential safety hazard occurred in electric wiring dynamic operation.And it is only classical with comprehensively perfect communication mode
" RS485 communication ports ", " network interface ", and also very useful " SMS prompting " and " GPRS wireless telecommunications+mobile phone
End APP " functions, can easily constitute jointly fire monitoring system, or individually group with other alarms or monitoring host computer
Net build City-level " intelligent Electrical Safety early warning supervisory systems ", it is ensured that can more in time, rapidly process Electrical Safety hidden danger,
Greatly improve electrical safety.
Claims (8)
1. a kind of intelligent power safe early warning watch-dog, including single machine unit (1) and respectively it is connected with single machine unit (1)
Liquid crystal display display unit (2), three-phase current detection unit (3), residual current detection unit (4), temperature detecting unit, alarm are single
Unit, circuit-breaker status collecting unit (5), circuit breaker control unit (6) and communication unit, it is characterised in that including fault electric arc inspection
Unit (7) is surveyed, fault electric arc detection unit (7) includes the bandpass filtering unit (71), the fault electric arc signal extraction that are sequentially connected
Unit (72), shaping pulse processing unit (73) and Phase Processing unit (74), the input of bandpass filtering unit (71) pass through
Coupling sampling capacitance is connected with alternating current 220V circuit, the output end of Phase Processing unit (74) and described single machine unit (1)
It is connected.
2. intelligent power safe early warning watch-dog according to claim 1, it is characterised in that described bandpass filtering unit
(71) including electric capacity C14, electric capacity C26, electric capacity C22, resistance R8, resistance R18, resistance R23 and inductance L2, inductance L3, electric capacity C14
It is exactly described coupling sampling capacitance with electric capacity C26；Described fault electric arc signal extraction unit (72) includes resistance R9, resistance
R14, resistance R20, resistance R24, electric capacity C18, electric capacity C24 and diode D6, diode D7, voltage-stabiliser tube V1；Electric capacity C14, electric capacity
One end of C26 is connected with alternating current 220V circuit respectively；The other end of electric capacity C14 is connected with one end of resistance R8, and resistance R8's is another
One end, is grounded through inductance L2 all the way, and another road is connected through resistance R9 with the positive pole of diode D6, and the negative pole of diode D6 is through resistance
R14 is grounded, and the positive pole of diode D6 is grounded through electric capacity C18 again；The other end of electric capacity C26 is connected with one end of resistance R23, resistance
The other end of R23, is grounded through inductance L3 all the way, and another road is connected through resistance R24 with the positive pole of diode D7, and diode D7's is negative
Pole is grounded through resistance R20, and the positive pole of diode D7 is grounded through electric capacity C24 again；One end of electric capacity C22 and the ground wire phase of alternating current 220V
Even, the other end of electric capacity C22 is grounded through resistance R18, the two ends of voltage-stabiliser tube V1 respectively with the negative pole and diode D7 of diode D6
Negative pole be connected, and diode D6 negative pole and diode D7 negative pole respectively with described shaping pulse processing unit (73)
Input be connected.
3. intelligent power safe early warning watch-dog according to claim 1 and 2, it is characterised in that at described shaping pulse
Reason unit (73) includes resistance R12, resistance R16, resistance R17, resistance R19, resistance R21, resistance R22, electric capacity C15, electric capacity
C21, electric capacity C23, electric capacity C25 and amplifier U7, amplifier U8；One output end of described fault electric arc signal extraction unit (72)
Not only it is connected with one end of resistance R12 but also is connected with one end of electric capacity C15, the other end of resistance R12 is grounded through electric capacity C21, electric capacity
The other end of C15 is grounded through resistance R16, and resistance R12 is connected with the tie point of electric capacity C21 with the in-phase input end of amplifier U7, electricity
Hold C15 to be connected with the inverting input of amplifier U7 with the tie point of resistance R16, the output end of amplifier U7 is grounded through resistance R17；Institute
Another output end for the fault electric arc signal extraction unit (72) stated not only is connected but also with electric capacity C25's with one end of resistance R21
One end is connected, and the other end of resistance R21 is grounded through electric capacity C23, and the other end of electric capacity C25 is grounded through resistance R19, resistance R21 and
The tie point of electric capacity C23 is connected with the inverting input of amplifier U8, and the tie point of electric capacity C25 and resistance R19 and amplifier U8's is same
Phase input is connected, and the output end of amplifier U8 is grounded through resistance R22；The output end of amplifier U7 and the output end of amplifier U8 respectively and
The input of described Phase Processing unit (74) is connected.
4. intelligent power safe early warning watch-dog according to claim 1 and 2, it is characterised in that described Phase Processing list
First (74) include trigger U6 and trigger U9, and trigger U6, trigger U9 use 4013 double D triggers；Trigger U6's
The output end of CLK pin, the CLK pin of trigger U9 respectively with described shaping pulse processing unit (73) is connected, the D of trigger U6
Pin, the D pin of trigger U9 connect+3.3V voltages, and the S pin of trigger U6, the S pin of trigger U9 are grounded, the R pin of trigger U6
It is connected with the Q pin of trigger U9, trigger U6'sPin is connected with the R pin of trigger U9, the Q pin of trigger U6, trigger U9
'sPin is connected with described single machine unit (1) respectively.
5. intelligent power safe early warning watch-dog according to claim 1, it is characterised in that including detecting voltage by three phase list
First (8), detecting voltage by three phase unit (8) is connected with described single machine unit (1).
6. intelligent power safe early warning watch-dog according to claim 1, it is characterised in that described alarm unit is bag
Include the acousto-optic warning unit (9) of luminescence alarm diode and buzzer.
7. intelligent power safe early warning watch-dog according to claim 1, it is characterised in that described temperature detecting unit
Including line temperature detection unit (10) and distribution box internal temperature detection unit (11), line temperature detection unit (10) and match somebody with somebody
Electronic box internal temperature detection unit (11) is connected with described single machine unit (1) respectively.
8. the intelligent power safe early warning watch-dog according to claim 1 or 2 or 5 or 6 or 7, it is characterised in that described
Communication unit includes RS485 communication modules (12), ethernet communication module (13), GPRS wireless communication modules (14) and short message hair
Penetrate module (15), RS485 communication modules (12), ethernet communication module (13), GPRS wireless communication modules (14) and short message hair
Module (15) is penetrated to be connected with described single machine unit (1) respectively.
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| CN201621380914.6U CN206301449U (en) | 2016-12-15 | 2016-12-15 | Intelligent power safe early warning watch-dog |
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| CN201621380914.6U CN206301449U (en) | 2016-12-15 | 2016-12-15 | Intelligent power safe early warning watch-dog |
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| CN206301449U true CN206301449U (en) | 2017-07-04 |
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| CN107588509A (en) * | 2017-09-06 | 2018-01-16 | 安徽乐金环境科技有限公司 | The self checking method of air purifier |
| CN108022397A (en) * | 2018-01-18 | 2018-05-11 | 智慧式控股有限公司 | A kind of electrical fire detecting system of controlling intelligent household appliances |
| CN108152633A (en) * | 2017-12-27 | 2018-06-12 | 北京安航达科技有限公司 | Non-specific devices Working state analysis control method based on current drain waveform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107588509A (en) * | 2017-09-06 | 2018-01-16 | 安徽乐金环境科技有限公司 | The self checking method of air purifier |
| CN108152633A (en) * | 2017-12-27 | 2018-06-12 | 北京安航达科技有限公司 | Non-specific devices Working state analysis control method based on current drain waveform |
| CN108022397A (en) * | 2018-01-18 | 2018-05-11 | 智慧式控股有限公司 | A kind of electrical fire detecting system of controlling intelligent household appliances |
| CN108414866A (en) * | 2018-05-24 | 2018-08-17 | 北京正翰能源科技有限公司 | Proactive intelligence protector |
| CN109144002A (en) * | 2018-08-28 | 2019-01-04 | 宋文波 | A kind of " coal changes electricity " intelligent monitor system based on big data platform |
| CN109946535A (en) * | 2018-12-28 | 2019-06-28 | 上海汇鸿智能控制***股份有限公司 | A kind of fault arc detection method |
| CN110716155A (en) * | 2019-10-24 | 2020-01-21 | 国网上海市电力公司 | Low-voltage power supply loop abnormal working condition perception algorithm and device |
| CN110716155B (en) * | 2019-10-24 | 2022-05-06 | 国网上海市电力公司 | Low-voltage power supply loop abnormal working condition perception algorithm and device |
| CN114069873A (en) * | 2021-11-29 | 2022-02-18 | 嘉兴华炳物联网科技有限公司 | Power consumption safety intelligent monitoring system based on secondary circuit |
| CN114301173A (en) * | 2021-12-21 | 2022-04-08 | 苏州华天国科电力科技有限公司 | Intelligent safety power utilization management and control system based on miniature management terminal |
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